Area Guesser

Area Guesser combines visual memory, numeric recall, and area intuition. You see a single filled shape for about three seconds with its cm² at the center. Then it vanishes and four new shapes appear without area labels. Exactly one matches the area you memorized (in cm² and by eye); the distractors differ by only a few percent. After you tap, every quadrant shows its cm² so you can see how cruelly close the wrong answers were.

Open Area Guesser

How a round flows

Memorize. One shape sits in the middle while a seconds countdown ticks down (about 3 seconds).
Choose. The board switches to a 2×2 grid of different shapes — no cm² on the cells yet (same px→cm mapping as Match the Area once revealed).
Tap the quadrant you believe matches the memorized area.
Reveal & feedback. Each cell shows its cm². The correct cell gets a green outline. If you missed, your pick gets a red outline and the streak resets.
Next round loads a fresh puzzle.

Why it feels hard

During memorize the reference shows cm² at its center (same px→cm convention as Match the Area).
On the grid you only have shapes until you commit — then every quadrant shows cm², and the distractors are usually only a few percent off the target, so the revealed numbers sting.
Distractors are tuned to stay in a narrow band around the target area so obvious outliers are rare.

Tips

During memorize, note overall reach (how far the shape extends from its middle) and how thick or hollow it feels — a tall thin ellipse and a squashed ellipse can trade tricks at similar areas.
After you tap, compare revealed cm² to what you memorized — tiny gaps explain hard misses.
First guess: trust your gut; on Next round try comparing mentally against the previous difficulty once you have a feel for the board scale.
Streaks reward consistency — don’t rush the countdown; use the full three seconds.

Quick checklist

I actually looked at the shape for the whole memorize phase instead of glancing away.
I treated the task as area, not same shape type.
After a miss, I replay mentally what felt different before tapping Next round.